• The Grammar Files series consists of 5 Books, 64 pages each, for CEF Levels: AI - A2 - BI - B2 - C1. . .• Each unit starts by briefly introducing the new Grammar point and then students have to practise doing a variety of exercises. . .• These books can also be used as time fillers; perfect for when teachers have some extra time at the end of a lesson, or want to revise a specific Grammar point. . .• Levels B1 and B2 have also been written for students who are planning to take the IELTS exam.